Plastic is part of our daily life. We drink our water on a plastic containers, stored our food or left over on a plastic container and so on.
Recently we became aware of the health danger that plastic has. Many studies where conducted that proves, plastic containers contains cancer-causing chemicals that can leach to our food.
Make sure you know the safe containers and never ever microwave on plastic containers because heat can activate the cancer-causing chemicals.
But plastic are alike. While some forms of plastic are highly toxic and highly volatile, other are safer and more stable.

• CONTAINERS WITH 3,6,7 on the bottom are the most dangerous of all. They contain a dangerous and volatile chemical called BPA, and should be avoided at all costs.
• CONTAINERS with a 4 or 5 on the bottom are generally considered safe. But you should probably use them sparingly. And you should never use them on microwave.
• CONTAINERS with a 1 or 2 on the bottom are the safest. These includes clear water containers, as well as most cloudy containers you normally find water and milk in. These containers called PETE and HDPE, are safe for storing food and drinks. But again, you should never used them on microwave.